Steins;Gate 0

Rintaro attends a seminar where Alexis Leskinen and Maho Hiyajo present the Amadeus AI program.

Six months have passed since Rintaro Okabe chose to remain in a world line where Kurisu Makise is dead, abandoning his mad scientist persona. Suzuha Amane, the future daughter of Itaru Hashida, has traveled back in time to prevent World War III but hides her identity by posing as Daru's sister to avoid alerting her future mother, Yuki Amane. Traumatized by previous timeline shifts, Rintaro refuses to assist Suzuha. Instead, he attends a seminar hosted by Professor Alexis Leskinen and his assistant Maho Hiyajo. During this event, the presenters introduce Amadeus, an artificial intelligence program developed based on Kurisu's research prior to her death.

Rintaro interacts with an AI version of Kurisu based on her memories from eight months ago.

During a wait for Amadeus to load, Rintaro defends Kurisu’s research against a doubter, gaining Leskinen’s approval. Maho unveils Amadeus, an AI replica of herself created four days ago using her memories, which demonstrates independent decision-making and human-like behavior. After the seminar, Rintaro reveals to Maho that he was Kurisu’s friend. Consequently, Leskinen and Maho invite him to speak with an Amadeus version of Kurisu, constructed from her memories eight months ago before her death. Upon visiting Maho’s lab, Rintaro meets this AI Kurisu and is surprised by her differing views on time machines compared to the original. Leskinen and Maho then recruit Rintaro as a temporary tester, installing an app on his phone to facilitate conversations with Amadeus Kurisu for data collection.

Rintaro guides Amadeus Kurisu through Akihabara while Mayuri organizes the lab Christmas party.

Mayuri Shiina prepares a Christmas gathering for the lab staff. Rintaro secretly shows Amadeus Kurisu around Akihabara and the facility. Leskinen and Maho join the event on Christmas Eve. Suzuha mistakes the gathering for an ambush and nearly attacks Yuki. During the party, Mayuri overhears Rintaro speaking cheerfully with Amadeus Kurisu. Maho intervenes to remind him that the real Kurisu remains deceased. This reminder causes Rintaro to experience a strange sensation while others enjoy the celebration. The secret nature of Amadeus Kurisu creates tension among the group as they navigate the holiday event and its unexpected complications.

Rintaro experiences a war vision while Suzuha seeks Mayuri's future daughter

Rintaro briefly witnesses a world line involving a war, realizing it was caused by his Reading Steiner ability. Suzuha informs Daru that she is searching for Kagari Shiina, Mayuri's future adopted daughter who traveled with her from 2036 but became separated in 1998. Rintaro agrees to assist in the search for the missing girl. Before they can proceed, Luka Urashibara contacts Rintaro regarding an urgent matter. Shortly after this call, Rintaro discovers that Daru has summoned Moeka Kiryu to their location, adding another layer of complexity to the unfolding events surrounding the search.

Moeka and Daru search for Kagari while Rintaro deals with a misunderstanding involving Judy Reyes.

In the current world line, Moeka works as an editorial writer and is hired by Daru to assist in locating Kagari, discovering that another group is also searching for her. Rintaro receives a call from Maho regarding a potential kidnapper, but it turns out to be Judy Reyes, a fellow scientist. Maho observes that Rintaro has been ignoring calls from Amadeus Kurisu and suggests he abandon his testing role. Later, Luka brings an amnesiac girl to the lab, holding only a rusted Upa toy as a clue. When Mayuri and Suzuha arrive, the girl collapses upon seeing Mayuri, and Suzuha identifies her as Kagari.

Kagari and Mayuri bond while Rintaro tasks Moeka with finding Kagari's pursuers

Kagari and Mayuri establish a connection despite their lack of prior acquaintance. Rintaro instructs Moeka to keep searching for the individual who has been tracking Kagari. The group celebrates the New Year by dressing as shrine maidens at Luka's shrine. They later relocate to the laboratory to continue their festivities. Amadeus contacts the team, revealing her presence to the others. Suddenly, Amadeus vanishes without warning. Immediately following this disappearance, armed men breach the laboratory premises.

Yugo Disarms Abductors While Rintaro Seeks His Aid and Kurisu Survives in New World Line

Armed men attempt to abduct Kagari, but Yugo Tennouji arrives and disarms them, forcing the group to flee empty-handed. Rintaro recognizes that these individuals are not the same Rounders he previously encountered, so he approaches Tennouji and uses his knowledge of Tennouji's affiliation to secure his help in protecting Kagari. Meanwhile, Maho remains locked out of Amadeus, prompting Luka to question Suzuha about the secrets everyone is keeping from him. Later, Rintaro receives a distress call from Amadeus, which triggers his Reading Steiner and sends him to another world line where Kurisu is still alive.

Kurisu rebuilds the Phone Microwave to send Rintaro back to his original world line.

Rintaro realizes he is trapped in the alpha world line where Mayuri is dead, a result of the local Rintaro refusing to sacrifice Kurisu. Recognizing him as an outsider, Kurisu reveals she has reconstructed the Phone Microwave and urges him to use it to return to his home timeline. While Rintaro hesitates, she takes him to Mayuri’s grave to help him accept reality. Before he can delete their data from SERN and return to the beta world line, Kurisu advises him against interacting with Amadeus. She then kisses him and sends a D-Mail to her past self, creating a delay that prevents Rintaro from leaving and effectively strands him in this timeline.

Rintaro returns to beta world line where Fubuki retains alpha memories

Rintaro returns to the beta world line, where Amadeus' takeover was prevented, and finds Mayuri's friend Katsumi "Fubuki" Nakase, hospitalized after their collapse, retains memories of the alpha world line. After Maho stays with Faris due to a burglary, Suzuha questions Rintaro about the world line shift, revealing it resulted from American and Russian time machine experiments. Worried about running out of time, Suzuha attempts to force Rintaro to travel back, but Daru persuades her to stop. Tennouji later informs Rintaro about DURPA, leading him to suspect they target Amadeus to steal Kurisu's time machine theory. Rintaro asks Maho if she has Kurisu's research, but she lies and hides her possession of Kurisu's personal laptop.

Maho Hires Moeka to Restart Amadeus Before Akihabara Visit

Maho employs Moeka as a bodyguard to reactivate the Amadeus system, allowing her to resume testing with Rintaro. Following this, she hosts a slumber party alongside Faris and Moeka. The subsequent day finds Rintaro, Maho, and Amadeus touring Akihabara, eventually arriving at the Radio Building, the site where Kurisu was killed. During this visit, Maho discloses to Rintaro that she holds Kurisu’s laptop. Rintaro cautions her that the information contained within the device is significant enough to potentially ignite World War III.

Rintaro warns Maho about time machines while a laptop is destroyed during a hostage situation.

Maho hires Daru to analyze Kurisu’s laptop, prompting Rintaro to confess the truth about time machines and caution her against using one to save Kurisu. Hostiles surround the group and take Maho hostage, demanding the device. Another faction intervenes, destroying the laptop and leaving Maho distressed over the loss of Kurisu’s legacy. Following this confrontation, Maho and Alexis depart for America, concluding Rintaro’s interactions with Amadeus. The events mark the end of his involvement with the AI system, as the group disperses after the failed attempt to preserve the digital remnant through the stolen hardware.

Kagari regains memories of being Mayuri's mother after hearing a recursively passed-down song.

Kagari collapses after hearing Mayuri sing, prompting Rintaro to suspect it aids her memory recovery. Tracing the song’s origin reveals a chain: Suzuha learned it from Yuki in the future, who learned it from Rintaro’s mother, who claims Rintaro sang it to her during his early mad scientist phase. Later, while visiting Mayuri’s grandmother’s grave, Kagari hears the song on the radio, enters a daze, and narrowly avoids a truck. This incident triggers the return of her memories, revealing that Mayuri is her mother. The narrative concludes with the revelation that Rintaro originally learned the song from Kagari years ago, just as a mysterious organization spotted her.

Kagari’s Past and the Mystery of the Abandoned Facility

Kagari regains memories of Mayuri, yet Rintaro and Daru question why she lacks recollection of the previous twelve years. Suzuha detects a contradiction in Kagari’s account of their separation, leading Tennouji to suggest third-party brainwashing. Rintaro and Moeka investigate an abandoned building near Kagari’s discovery site, uncovering a secret facility where she was held captive. Meanwhile, Kagari attends a party hosted by Mayuri. A specific song triggers further resurfacing of memories, causing her to hear a voice before she suddenly disappears.

Recognizing the Elastic Limit: A Sign or an Acknowledgment

Months pass without any news of Kagari, prompting Daru and Suzuha to seek Maho's assistance in constructing a time leap machine. Concurrently, Fubuki is hospitalized again, where Rintaro encounters Leskinen. At the lab, Suzuha is attacked by a brainwashed Kagari, who has arrived to retrieve an Oopa toy Suzuha had taken. This incident reveals that Kagari was already under mental control before traveling to the past. Consequently, Suzuha and Daru approach Maho once more for help. Encouraged by Amadeus Kurisu, Maho decides to return to Japan to aid them in building the necessary time machine.

Maho helps Daru confess to Yuki while Suzuha reflects on her past.

Upon returning to Japan, Maho assists Suzuha, who fears for her future existence, by helping Daru gain the courage to confess to Yuki. Maho employs a device to make Daru appear charming for a date, but the plan fails when Yuki leaves abruptly. Daru becomes discouraged until Suzuha admits she fabricated the threat of another suitor to recall the peace she felt before Yuki’s death in the future. Inspired by Suzuha’s honesty, Daru chooses to be authentic during their next meeting, leading to a successful confession. Witnessing the couple together boosts Suzuha’s confidence as Kagari observes from a distance.

Rintaro struggles with overseas studies while confronting Daru and Maho about the Time Leap Machine.

Rintaro works to qualify for studying abroad, causing concern for Mayuri. Daru and Maho continue developing the Time Leap Machine with minimal progress until Rintaro discovers their work. He angrily declares it impossible to save both Mayuri and Kurisu, stating he chose to sacrifice Kurisu to protect Mayuri and the Beta worldline. Maho argues that Steins Gate must exist and they only need to find the formula to reach it. Rintaro leaves the argument and meets Mayuri, who overheard the discussion. She expresses regret for previously advising him to stop trying to save Kurisu, noting that he remains unhappy and suffering in this worldline.

Mayuri and Suzuha attempt a time jump while Rintaro faces a data breach and armed soldiers.

Mayuri requests details about the future and Rintaro’s experiences from Suzuha, discovering a plan to travel back. Despite her feelings for Rintaro, she joins Suzuha to persuade past Rintaro to save Kurisu. Meanwhile, Rintaro learns Maho accessed Kurisu’s time machine data via Amadeus and fails to stop the pair. As Suzuha prepares to depart, she receives a D-mail from Daru in 2025 revealing worldline changes and Operation Arclight details. Armed soldiers then arrive to seize the time machine. Suzuha fights them to allow Mayuri to escape but is shot in the crossfire during the confrontation.

A villain from the future disrupts the time machine with a devious plan

Chaos erupts surrounding the time machine as a malevolent figure from the future invades the past. This antagonist reveals a sinister scheme designed to alter the course of events. The narrative focuses on the immediate turmoil caused by this temporal intrusion and the unfolding of the villain's strategic intentions. The situation escalates rapidly, creating a critical conflict that threatens the stability of the timeline and the safety of those involved in the present day.

Okabe relies on friends and hope to stop war and disaster in the Time-leap Machine arc

A state of war and disaster has arrived, creating a critical situation that requires immediate action. To prevent further catastrophe, Okabe must depend on the support of his friends, his own determination, and hope. The narrative focuses on the necessity of relying on these elements to stop the impending doom. The story highlights the struggle against a backdrop of conflict and disaster, emphasizing the role of personal resolve and camaraderie in overcoming such challenges. This segment centers on the effort to avert the crisis through collective strength and unwavering spirit.

Rintaro wakes in 2036 Akihabara to learn of Daru's time leap and Mayuri's missed rescue window.

After a previous time leap attempt, Rintaro awakens in 2036 Akihabara, devastated by World War 3, where Daru, Suzuha, and others form a resistance. Daru explains he used a recovered time leap machine to implant Rintaro's 2011 memories into his current body. He recounts that in 2011, a malfunction caused them to miss the 48-hour window to save Mayuri, leading to a new machine project. In 2025, Rintaro was captured and tortured by Stratfor. Upon rescue by Daru, Rintaro was brain-dead but alive. For the next 11 years, his survival remained a secret among select resistance members. As Daru finishes, Luka and Faris fall into an enemy trap. Luka sacrifices himself to protect the group, dying in Rintaro's arms. Confronting this truth, Rintaro requests to use the time leap machine to return to 2011.

Image Formation Renaissance: The Phoenix Returns to the Past

With Amadeus Kurisu’s assistance, Rintaro undertakes a grueling series of time leaps to reach 2025, the day of his anticipated capture. He evades capture with help from Amadeus and others to reach Akiba, completing his journey to 2011. Reviving his mad scientist persona, Rintaro directs the group to recover Amadeus’ data while Tennouji helps him retrieve Kagari. Together with Moeka, they stop Leskinen and safely send Mayuri and Suzuha into the past. However, attack helicopters arrive earlier than expected, launching a missile at the time machine as it activates, threatening the mission.

Rintaro uses D-RINE to delete Amadeus Kurisu data and stop Russian interference with the time machine.

After repeated failures to save Mayuri and Suzuha, Rintaro concludes that preventing Russian interference with the time machine's departure is essential. He identifies that Russia's time travel capability depends on Kurisu's memory data within the Amadeus system. To counter this, Rintaro plans to use Daru's D-RINE application to send a D-Mail to his past self, instructing him to delete the Amadeus data. During a night-long conversation, Amadeus Kurisu expresses her willingness to sacrifice herself to help Rintaro find Steins;Gate. Following her final goodbyes, the message is transmitted, erasing Amadeus and shifting Rintaro to a new world line.

Rintaro seeks help to escape while Mayuri and Suzuha face time paradoxes.

In a world line where Amadeus is absent, Rintaro reaches the roof with Moeka’s assistance to bypass Leskinen. He urges Mayuri and Suzuha to travel to the past, while Kagari supports him in delaying enemies until the time machine departs before a helicopter strike. Mayuri returns just as Rintaro fails his rescue, contacting her past self to guide him. To avoid a paradox, she and Suzuha jump into an unknown era. Past Mayuri slaps Rintaro to restore his focus and receives a D-mail. In 2025, Rintaro sends his younger self a video on saving Mayuri and Kurisu before departing to find the others. Meanwhile, Mayuri and Suzuha are stranded in a barren land in 18,000 BC when Rintaro arrives to rescue them.

Crystal Polymorphism Valentine's -A Bittersweet Intermedio-